31302112100321 has 4 divisors (see below), whose sum is σ = 31304204922132. Its totient is φ = 31300019278512.

The previous prime is 31302112100309. The next prime is 31302112100383. The reversal of 31302112100321 is 12300121120313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3743601955921 + 27558510144400 = 1934839^2 + 5249620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31302112100321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31302112100293 and 31302112100302.

It is not an unprimeable number, because it can be changed into a prime (31302112100621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046388470 + ... + 1046418383.

It is an arithmetic number, because the mean of its divisors is an integer number (7826051230533).

Almost surely, 2^{31302112100321} is an apocalyptic number.

It is an amenable number.

31302112100321 is a deficient number, since it is larger than the sum of its proper divisors (2092821811).

31302112100321 is a wasteful number, since it uses less digits than its factorization.

31302112100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092821810.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31302112100321 its reverse (12300121120313), we get a palindrome (43602233220634).

The spelling of 31302112100321 in words is "thirty-one trillion, three hundred two billion, one hundred twelve million, one hundred thousand, three hundred twenty-one".